From ca6c6e1d3e2efb05a857e349789e54ee319a4439 Mon Sep 17 00:00:00 2001
From: Our Air Quality <info@ourairquality.org>
Date: Thu, 24 Nov 2016 02:56:05 +1100
Subject: [PATCH] open_esplibs libnet80211: source code for
 sdk_cnx_node_search. (#280)

Also code for sdk_cnx_sta_leave, although disabled due to accessing static date, but it shows a reference to the netif->flags and the NETIF_FLAG_DHCP flag removed in lwip v2.
---
 open_esplibs/libnet80211/wl_cnx.c | 95 +++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/open_esplibs/libnet80211/wl_cnx.c b/open_esplibs/libnet80211/wl_cnx.c
index 563bcbc..3b7d709 100644
--- a/open_esplibs/libnet80211/wl_cnx.c
+++ b/open_esplibs/libnet80211/wl_cnx.c
@@ -7,5 +7,100 @@
 #if OPEN_LIBNET80211_WL_CNX
 // The contents of this file are only built if OPEN_LIBNET80211_WL_CNX is set to true
 
+#include "espressif/esp_misc.h"
+#include "esplibs/libnet80211.h"
+#include <string.h>
+#include "lwip/dhcp.h"
+
+ETSTimer sdk_sta_con_timer;
+void *sdk_g_cnx_probe_rc_list_cb;
+
+#if 0
+
+// Most of the code in this file assesses static data so it will be all or none.
+static uint32_t Ldata001;
+static uint8_t Ldata003;
+static uint8_t Ldata004;
+static uint32_t Ldata006;
+static void *Ldate007;
+
+// Use of the netif->flags and the NETIF_FLAG_DHCP flag removed in lwip v2.
+void sdk_cnx_sta_leave(struct sdk_g_ic_netif_info *netif_info, void *arg1) {
+    struct netif *netif = netif_info->netif;
+
+    uint32_t phy_type = sdk_ieee80211_phy_type_get();
+    uint16_t v1 = *(uint16_t *)(arg1 + 0x1a) & 0xfff;
+    sdk_ic_set_sta(0, 0, arg1, 0, v1, phy_type, 0, 0);
+
+    netif_set_down(netif);
+
+    // The NETIF_FLAG_DHCP flags is removed in lwip v2?
+    if (netif->flags & 0x8) {
+        dhcp_release(netif);
+        dhcp_stop(netif);
+    }
+
+    uint32_t v2 = *(uint8_t *)(arg1 + 0xe8);
+    free(sdk_g_ic.v._unknown190[v2]);
+    sdk_g_ic.v._unknown190[v2] = NULL;
+
+    if (sdk_g_ic.v._unknown190[0]) {
+        free(sdk_g_ic.v._unknown190[0]);
+        sdk_g_ic.v._unknown190[0] = NULL;
+    }
+
+    if (sdk_g_ic.v._unknown190[1]) {
+        free(sdk_g_ic.v._unknown190[1]);
+        sdk_g_ic.v._unknown190[1] = NULL;
+    }
+
+    sdk_scan_cancel();
+
+    sdk_wDev_SetRxPolicy(0, 0, 0);
+
+    Ldata001 = 2;
+
+    uint8_t v3 = *(uint8_t *)(arg1 + 0x6);
+    if (v3 & 2) {
+        *(uint8_t *)(arg1 + 0x6) = v3 & 0xfd;
+        sdk_cnx_rc_update_state_metric(arg1, -7, 1);
+        Ldate007 = arg1;
+    }
+
+    sdk_cnx_remove_rc(arg1);
+
+    Ldata006 = 0;
+    *(uint32_t *)(arg1 + 0x8) &= 0xfffffffe;
+    netif_info->_unknown88 = NULL;
+
+    return;
+}
+#endif
+
+void IRAM *sdk_cnx_node_search(uint8_t mac[6])
+{
+    int end = sdk_g_ic.s._unknown310 + 2;
+
+    // Note this defensive test seems dead code, the value is loaded
+    // as a uint8_t value so adding 2 ensures this test never passes.
+    if (end < 1)
+        return NULL;
+
+    struct sdk_netif_conninfo **conninfo = sdk_g_ic.v.softap_netif_info->conninfo;
+
+    int i = 0;
+    do {
+        struct sdk_netif_conninfo *info = conninfo[i];
+
+        if (info) {
+            if (memcmp(mac, info->mac_addr, 6) == 0) {
+                return info;
+            }
+        }
+        i++;
+    } while (i < end);
+
+    return NULL;
+}
 
 #endif /* OPEN_LIBNET80211_WL_CNX */